The answer is 79. It seems to be easy but time plays a major role in GRE (Quantitative). it has to be solved in a matter of seconds, not by calculating all the values.

Basic Math

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Question:

Let us consider there are totally 20 steps. On the first day, a snail climbs up three steps and on the second day, it comes down two steps. It goes on further up and down on alternative days. When will the snail reach the top (20 steps)?

Senikaanth K.

Answer:

The answer is thirty-five days.
Explanation :
On day 1 - 3 steps
Day 2 - 1 step
Day 3 - 4 steps
Day 4 - 2 steps
Likewise on day 34, it climbs up till 17 steps and on day 35, it reaches 20 steps.

Electrical Engineering

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Question:

In Memory Design, will a single bit-line be enough for both read and write process in 6T SRAM?

Senikaanth K.

Answer:

In 6T SRAM, for a read process, a single bit-line will be enough but for a write process (especially for writing 1), while using single bit-line there will be a lesser voltage than the required voltage at the point of write. So an inverted bit line is required to precharge the point of write while writing 1.

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